Bird Technologies 21-87A-11-xx-T Series-Manual - Manual (Page 9)

TX RX Systems Inc. Manual 7-9100-5 10/17/11 Page 3
Tx-to-TX Separation Cavity Loss (dB)
Channel Loss (dB) vs. Number of Channels
2 3 4 5 8 10 12
1 MHz
-1.25
-2.1 -2.3 -2.4 -2.5 -2.8 -3.0 -3.3
500 KHz -2.3 -2.8 -3.0 -3.2 -3.6 -3.9 -4.1
450 KHz -2.4 -2.9 -3.2 -3.4 -3.9 -4.1 -4.3
250 KHz -1.80 -3.1 -3.8 -4.1 -4.4 -4.9 -5.2 -5.5
Table 2: Typical T-Pass Channel Insertion Loss.
Note regarding Table 2: The typical channel losses specified here are for equally spaced channels
only. Channel loss may be higher or lower in multicouplers where separation varies from one channel to
another. Contact TX RX Systems for T-Pass channel loss specifications based on your actual system
frequency plan.
0
-5
Atten
uation (dB)
-10
-15
-20
-30
-25
-35
-40
-45
-50
-55
0.01 0.1 1 10
Offset from Fo (MHz)
100
73-90-11-Series Systems
6.625" Diameter 3/4-Wave, Fo = 860 MHz
IL = -1.25 dB
IL = -1.80 dB
Figure 2: Typical Transmitter Noise Suppression.